This game is ... epic. You can play as three different species in this game.
-Alien/Xenomorph
-Predator/Hunter
-Human/Survivor
Each of them have a connection to the other species in the storyline. The storyline is cut up in three sections. One for each species.
Humans:
-You play as a Rookie that survives as crash that cuased from a Predator spacecraft destroying the Marlow. A human spacecraft.
-Great weaponry. Like pistol which has unlimited ammo. Shotgun, assault rifle, rifle, and a mini-gun with a targetting system (lock on effects).
-Has the use of a flashlight and flares for those dark places.
-Also has a motion sensor radar
-Some levels you have assistance from your own fellow marines but die quick
Alien/Xenomorph:
-Creepy bug alien thing that was used in a human facility that escapes.
-You have no weapons for this species. Only your tail and claws.
-Has ability to climb on walls and any surface without falling
-Barely seen in dark areas
-Can crawl in vents
-Can have assistence with fellow aliens
Predator/Hunter:
-An elite warrior with advanced technology than humans that is trying to exterminate the spread of the parasite, Xenomorphs or Aliens.
-Weaponry is amazing and far more powerful. Lazer cannon with lock-on abilities, mines, smart disk (kinda like a boomer-rang with many blades on it), and a spear.
-You can turn invisible (AWESOME) and (of course) heat seeking visuals (for humans) and alien seeking vision.
-You can also jump amazingly high
Same abilities for Hunter and Alien:
-Steath kill (only used for humans/androids)
-Sprinting